<!-- 登录页面组件 -->
<template>
  <div class="loginContainer">
      <div class="loginInner">
        <div class="login_header">
          <h2 class="login_logo">硅谷外卖</h2>
          <div class="login_header_title">
            <a href="javascript:;" :class="{on: loginWay}" @click="loginWay=true">短信登录</a>
            <a href="javascript:;" :class="{on: !loginWay}" @click="handleLoginPwd">密码登录</a>
          </div>
        </div>
        <div class="login_content">
          <form @submit.prevent="handleLogin">
            <div :class="{on: loginWay}">
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="手机号" v-model="phone">
                <button :disabled="!rightPhone" class="get_verification" :class="{right_phone: rightPhone}"
                        @click.prevent="getCode">
                  {{computedTime === -1 ? '获取验证码' : `已发送（${computedTime}s）`}}
                </button>
              </section>
              <section class="login_verification">
                <input type="text" maxlength="6" placeholder="验证码" v-model="code">
              </section>
              <section class="login_hint">
                温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
                <a href="javascript:;">《用户服务协议》</a>
              </section>
            </div>
            <div :class="{on: !loginWay}">
              <section>
                <section class="login_message">
                  <input type="text" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
                </section>
                <section class="login_verification">
                  <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                  <input type="password" maxlength="8" placeholder="密码" v-model="pwd" v-else>
                  <div class="switch_button" :class="{off: !showPwd, on: showPwd}"  @click="showPwd = !showPwd">
                    <div class="switch_circle" :class="{right: showPwd}"></div>
                    <span class="switch_text" v-show="showPwd">abc</span>
                  </div>
                </section>
                <section class="login_message">
                  <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                  <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha" @click="refreshCode" ref="captcha">
                </section>
              </section>
            </div>
            <button class="login_submit">登录</button>
          </form>
          <a href="javascript:;" class="about_us">关于我们</a>
        </div>
        <a href="javascript:" class="go_back" @click="$router.back()">
          <i class="iconfont icon-jiantou2"></i>
        </a>
      </div>
      <AlertTip :alertText="alertText" v-show="alertShow" @closeTip="closeTip" />
    </div>
</template>

<script>
import AlertTip from '../../components/AlertTip/AlertTip'
import {reqSendCode, reqLoginSms, reqLoginPwd} from '../../api/index'
export default {
  data () {
    return {
      loginWay: true, // true代表短信登录，false代表账号密码登陆
      phone: '', // 输入的电话号码
      code: '', // 短信验证码
      computedTime: -1, // 计时器时间
      name: '', // 用户名
      pwd: '', // 用户密码
      showPwd: false, // 是否显示密码
      captcha: '', // 图形验证码
      alertText: '',
      alertShow: false
    }
  },
  computed: {
    rightPhone () {
      return /^1\d{10}$/.test(this.phone)
    }
  },
  methods: {
    handleLoginPwd () {
      this.loginWay = false
      this.refreshCode()
    },
    // 获取验证码
    async getCode () {
      // 如果计时器未开启，则开启新的计时器
      if (this.computedTime === -1) {
        // 启动计时器
        this.computedTime = 30
        this.intervalId = setInterval(() => {
          this.computedTime--
          if (this.computedTime < 0) {
            this.computedTime = -1
            clearInterval(this.intervalId)
          }
        }, 1000)
        // 发送ajax请求，向指定手机号发送验证码
        let result = await reqSendCode(this.phone)
        if (result.code === 1) {
          this.showAlert(result.msg)
          if (this.computedTime !== -1) {
            this.computedTime = -1
            clearInterval(this.intervalId)
          }
        }
      }
    },
    showAlert (msg) {
      this.alertText = msg
      this.alertShow = true
    },
    // 登陆
    async handleLogin () {
      let res // 登陆返回结果
      // 前台验证
      if (this.loginWay) { // 短信登陆
        const {rightPhone, code} = this
        if (!rightPhone) {
          // 手机号有误
          this.showAlert('手机号有误')
          return -1
        } else if (!/^\d{6}$/.test(code)) {
          // 短信验证码有误
          this.showAlert('短信验证码有误')
          return -1
        } else {
          // 前台验证通过,短信登陆
          res = await reqLoginSms(this.phone, this.code)
        }
      } else { // 密码登陆
        const {name, pwd, captcha} = this
        if (!name) {
          // 请输入用户名
          this.showAlert('请输入用户名')
          return -1
        } else if (!pwd) {
          // 请输入密码
          this.showAlert('请输入密码')
          return -1
        } else if (!captcha) {
          // 请输入验证码
          this.showAlert('请输入验证码')
          return -1
        } else {
          // 前台验证通过，密码登陆
          res = await reqLoginPwd({name, pwd, captcha})
        }
      }

      //  关闭定时器
      if (this.computedTime !== -1) {
        this.computedTime = -1
        clearInterval(this.intervalId)
      }
      // 对登陆的返回结果进行处理
      if (res.code === 1) {
        this.showAlert(res.msg)
        this.captcha = ''
        this.refreshCode() // 刷新验证码
      } else {
        const user = res.data
        // 将user数据保存到state
        this.$store.dispatch('saveUserInfo', user)
        // 将业面跳转到/profile
        this.$router.replace('/profile')
      }
    },
    // 关闭弹窗
    closeTip () {
      this.alertShow = false
    },
    // 刷新验证码
    refreshCode () {
      this.$refs.captcha.src = 'http://localhost:4000/captcha?time=' + Date.now()
    }
  },
  components: {
    AlertTip
  }
}
</script>

<style lang='stylus' rel='stylesheet/stylus' scoped>
  @import '../../common/stylus/mixins.styl'
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #02a774
          text-align center
        .login_header_title
          padding-top 40px
          text-align center
          >a
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin-right 40px
            &.on
              color #02a774
              font-weight 700
              border-bottom 2px solid #02a774
      .login_content
        >form
          >div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid #02a774
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.right_phone
                  color #000
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s,border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background #02a774
                >.switch_circle
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                  transition transform .3s
                  &.right
                    transform translateX(27px)
            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              >a
                color #02a774
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        >.iconfont
          font-size 20px
          color #999
</style>
